Even though it's made by the same supplier, should we assume the oils are all exactly the same? I would suspect that a contract producer may modify the additive package based on the requirements of the company privately labeling the oil. I understand this goes on with gasoline production. The same refinery may be producing gasoline for many different brands, but each brand can specify what additives, ex. detergents, they wanted added.It’s made by Warren Distribution so it’s decent oil and is literally the same as Costco’s Kirkland, Wal Mart’s SuperTech and dozens of others. They even all share the same dexos license number.